MFC parent window Ws_clipchildren style effects on child window refreshes and form region drawing problems Ws_clipchildren and Ws_clipsiblings

How to change the properties of the main window in a program created by MFC

Excerpt from: http://blog.sina.com.cn/s/blog_4bebc4830100aq1m.html

In the single-document interface created by MFC:

(Based on the dialog box, add the PreCreateWindow function directly inside the virtual function in the dialog box's Class wizard, but there is actually no use to try.) Thank you for your test. ）

Add the following code in CMainFrame::P Recreatewindow (createstruct& cs) to fix the window size

Cs.style = ws_overlapped | Ws_sysmenu | ws_minimizebox;//| Ws_thickframe;
Cs.style &= ~ws_border;
Cs.dwexstyle &= ~ws_ex_clientedge;
int Iwinborderx = GetSystemMetrics (Sm_cxborder);
int iwinbordery = GetSystemMetrics (Sm_cyborder);
int icaptiony = GetSystemMetrics (sm_cycaption);
int imenuy = GetSystemMetrics (Sm_cymenu);
int istausy = GetSystemMetrics (Sm_cymenu);
CS.CX = 510 + Iwinborderx;
cs.cy = 530 + iwinbordery + icaptiony + istausy + imenuy;

In the code above:

The first three lines determine the window style. | means add style, "&~" means to remove the style. Four to eight rows use the function GetSystemMetrics to get some system data, in pixels. Finally, the width and height of the window are calculated.

Style:

Ws_overlapped has title

Ws_sysmenu has a system menu: Minimize, Maximize, and close

Ws_minimizebox can minimize the window

Ws_thickframe can be dragged to change the window size

Ws_border with black border

Ws_maximizebox can maximize the window

dwExStyle:

Ws_ex_clientedge extended attributes with shaded borders

     getsystemmetrics parameter:

     SM_CMOUSEBUTTONS   return value is the number of mouse keys supported by the system and returns 0, the mouse is not installed on the system.　　

Sm_cxborder, sm_cyborder   returns the width and height of the Windows window border, in pixels, equivalent to the Sm_cxedge parameter

If Windows is in 3D form Sm_cxcursor, Sm_cycursor   Returns the width and height of the standard cursor in pixel values

Sm_cxdlgframe, sm_cydlgframe   equivalent, and sm_ Cxfixedframe and Sm_cyfixedframe

Sm_cxdoubleclk, sm_cydoubleclk   double-click a valid rectangular area in pixel value

Sm_ Cxedge, sm_cyedge   width and height of 3D borders in pixel values

Sm_cxfixedframe, sm_cyfixedframe   The thickness of the border around a window that has a title but cannot resize (usually some dialog boxes)

Sm_cxframe, sm_cyframe   equals Sm_cxsizeframe and Sm_cysizeframe The width and height of the window area of the

Sm_cxfullscreen, sm_cyfullscreen   full-screen window

Sm_cxhscroll, sm_cyhscroll    The height of the horizontal scrollbar and the width of the arrows on the horizontal scrollbar

sm_cxhthumb   the width of the slider on the horizontal scroll bar in pixels

Sm_cxicon, sm_cyicon    system default icon height and width (typically 32*32)

Sm_cxiconspacing, sm_cyiconspacing   the space between icons when viewing item with a large icon, This distance is always greater than or equal to

sm_cxmaximized, sm_cymaximized The default size of the maximized window at the top level

Sm_cxmaxtrack, Sm_cymaxtrack has the default maximum size of the window that can change the size border and title bar, and if the window is larger than this, the window is not movable.

Sm_cxmenucheck, Sm_cymenucheck the dimensions of the menu check mark bitmap that is calculated in pixels

Sm_cxmenusize, sm_cymenusize the size of the menu bar button calculated in pixels

Sm_cxmin, sm_cymin window can achieve the smallest size

Sm_cxminimized, sm_cyminimized the size of the normal minimized window

Sm_cxmintrack, sm_cymintrack minimum tracking distance, the window will not move when the user drags the distance less than this value.

Sm_cxscreen, sm_cyscreen the screen size calculated in pixels.

Sm_cxsize, sm_cysize the size of the title bar button calculated in pixels

Sm_cxsizeframe, sm_cysizeframe the thickness of the border around the window that can change size

Sm_cxsmicon, Sm_cysmicon the size of small icons in pixels, and small icons generally appear on the window's title bar.

Sm_cxvscroll, Sm_cyvscroll the width of the vertical scrollbar calculated in pixels and the height of the arrows on the vertical scroll bar

Sm_cycaption the height of a normal window caption calculated in pixels

Sm_cymenu the height of a single menu bar calculated in pixels

Sm_cysmcaption the height of the small title bar of a window calculated in pixels

Sm_cyvthumb the height of a scroll block in a vertical scrollbar calculated in pixels

sm_dbcsenabled if a value of true or not 0 indicates that the system has a double-byte version of USER.EXE installed, false or 0 is not.

Sm_debug if the value of TRUE or not 0 indicates that the system has a DEBUG version of USER.EXE installed, false or 0 is not.

Sm_menudropalignment if the value is true or not 0, the drop-down menu is right-aligned or left-aligned.

Sm_mousepresent if a value of true or not 0 is installed, the mouse is not installed.

Sm_mousewheelpresent a Wheel Mouse is installed if the value is true or not 0, otherwise it is not installed. (Windows NT only)

Sm_swapbutton if TRUE or not a value of 0 then the mouse key is exchanged or not.

Parent window Ws_clipchildren style effects on child window refreshes

Excerpt from: http://www.cppblog.com/zaccheo/articles/180331.html

Write the following program, test the parent window before and after setting Ws_clipchildren, the parent window call RedrawWindow or InvalidateRect child window Refresh effect

Operation	have a Ws_clipchildren	No Ws_clipchildren
InvalidateRect	Invalid zone increase for parent window No effect on child window	Invalid zone increase for parent window Invalid area of child window increased and the invalid area coordinates are the same (in screen coordinate system)
RedrawWindow Flag:rdw_invalidate	Invalid zone increase for parent window No effect on child window	Invalid zone increase for parent window Invalid area of child window increased and the invalid area coordinates are the same (in screen coordinate system)
RedrawWindow flag:rdw_invalidate| Rdw_allchildren	Invalid zone increase for parent window Invalid area of child window increased and the invalid area coordinates are the same (in screen coordinate system)	Invalid zone increase for parent window Invalid area of child window increased and the invalid area coordinates are the same (in screen coordinate system)
RedrawWindow flag:rdw_invalidate| Rdw_nochildren	Invalid zone increase for parent window No effect on child window	Invalid zone increase for parent window No effect on child window
Other Windows move on a parent-child window	The parent window receives the WM_PAINT message, but the invalid area is the intersection of the area after the parent window excludes the child window and the other currently moving window area The child window receives the WM_PAINT message, and the invalid area is the intersection of the child window and the area of the currently moving window	The parent window receives the WM_PAINT message, but the invalid area is the intersection of the window area that the parent window is currently moving The child window receives the WM_PAINT message, and the invalid area is the intersection of the child window and the area of the currently moving window

Form region drawing problem Ws_clipchildren and Ws_clipsiblings

Excerpt from: http://www.cnblogs.com/gleam/archive/2012/11/26/2789513.html

Ws_clipchildren, so that the parent form leaves the location of the subform on it when it is drawn, without drawing it, and that area is left with the subform to draw.
Ws_clipsiblings, which must be used in a subform so that the subform will be paint if it receives WM_PAINT and has many subforms (which MSDN says must not be in that area, that does not overlap).

The following is also the understanding of ws_clipsiblings
All overlapped windows and popup windows have ws_clipsiblings properties,
These windows cannot be plotted on its sibling window.

For a child window, if this property is not available, it can be plotted on its sibling window

┌────────┐
│a│
││
│┌─────┼───┐
││c││
││││
└──┼─────┘│
││
│b│
└──────────┘

If a, B are all child windows,
If a has a ws_clipsiblings attribute,
Then a redraw does not redraw part C

Clip is cut, removed meaning quite with the exclude of the English

Both Ws_clipchildren and ws_clipsibling are designed to reduce redraw, reduce flicker, and ensure that the overlapping portion of the window has only one window to implement the paint.

MFC Parent Window Ws_clipchildren styles The effects of child window refreshes and form region drawing problems ws_clipchildren and ws_clipsiblings